Rotary cutter device

Abstract

A rotary cutter device includes a rotating body, a plurality of rotary blades, a fixed blade, a feeding portion, and a control portion. The rotating body is configured to be rotatable around a central axis. The plurality of rotary blades are provided on the rotating body. The fixed blade is provided facing a trajectory that cutting edges of the plurality of rotary blades describe when the plurality of rotary blades rotate. The feeding portion is configured to feed a sheet-shaped object along a linear feed path that passes close to the fixed blade. The control portion is configured to rotate the plurality of rotary blades around the central axis toward the fixed blade from the opposite side of the feed path from the fixed blade.

What is claimed is: 
     
       1. A rotary cutter device, comprising:
 a rotating body that is configured to be rotatable around a central axis, the central axis being a virtual straight line; 
 a plurality of rotary blades that are provided on the rotating body in parallel to the central axis, each of the plurality of rotary blades being separated from the central axis and having a cutting edge on an end of the rotary blade that is farthest from the central axis, the cutting edges of the plurality of rotary blades extending in parallel to the central axis and describing a trajectory when the plurality of rotary blades rotate; 
 a fixed blade that is provided on an outer side of the trajectory and has a cutting edge on an end of the fixed blade, the cutting edge of the fixed blade facing the trajectory; 
 a feeding portion that is configured to feed a sheet-shaped object along a linear feed path that passes close to the fixed blade, the feed path passing from a cutting position through an area that is on the inner side of the trajectory, the cutting position being a position where one of the cutting edges of the plurality of rotary blades faces the cutting edge of the fixed blade, and the feed path then extending from a discharge position into an area that is on the outer side of the trajectory, the discharge position being a position where the feed path and the trajectory intersect and being different from the cutting position; and 
 a control portion that is configured to rotate the plurality of rotary blades around the central axis toward the fixed blade from the opposite side of the feed path from the fixed blade, 
 wherein 
 the plurality of rotary blades are disposed around the central axis such that, when a first blade is at the cutting position, all of one or more second blades are in positions that are separated from the feed path, the first blade being one of the plurality of rotary blades that is at the cutting position, one or more second blades being one or more of the plurality of rotary blades other than the first blade. 
 
     
     
       2. The rotary cutter device according to  claim 1 , wherein
 the central axis is located on the opposite side of the feed path from the fixed blade. 
 
     
     
       3. The rotary cutter device according to  claim 1 , wherein
 the plurality of rotary blades are disposed around the central axis such that, when one of the plurality of rotary blades is at the cutting position, at least another one of the plurality of rotary blades that is not at the cutting position is on the same side of the feed path as the fixed blade. 
 
     
     
       4. The rotary cutter device according to  claim 1 , wherein
 the plurality of rotary blades are disposed around the central axis such that a position of the center of gravity of the plurality of rotary blades is substantially coincident with the central axis. 
 
     
     
       5. The rotary cutter device according to  claim 4 , wherein
 the plurality of rotary blades are three rotary blades that are disposed around the central axis at 120-degree intervals. 
 
     
     
       6. The rotary cutter device according to  claim 1 , wherein
 the plurality of rotary blades include projections, each of the projections projecting from each of the plurality of rotary blades in a direction of rotation of the plurality of rotary blades.